Unframe chrome://extensions as it's the last (and only) uber item

chrome/browser/extensions/lazy_background_page_apitest.cc

Index: chrome/browser/extensions/lazy_background_page_apitest.cc
diff --git a/chrome/browser/extensions/lazy_background_page_apitest.cc b/chrome/browser/extensions/lazy_background_page_apitest.cc
index f6599d6119bc2c4f66826dc38f7552653799909e..32e9181e33d9e978bf0b3eb36bb02661bd01ada8 100644
--- a/chrome/browser/extensions/lazy_background_page_apitest.cc
+++ b/chrome/browser/extensions/lazy_background_page_apitest.cc
@@ -571,6 +571,7 @@ IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, EventDispatchToTab) {
 // when it is destroyed.
 IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, UpdateExtensionsPage) {
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUIExtensionsURL));
+  auto* extensions_page = browser()->tab_strip_model()->GetActiveWebContents();
 
   ResultCatcher catcher;
   base::FilePath extdir = test_data_dir_.AppendASCII("lazy_background_page").
@@ -597,13 +598,6 @@ IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, UpdateExtensionsPage) {
   // Lazy Background Page has been shut down.
   EXPECT_FALSE(IsBackgroundPageAlive(last_loaded_extension_id()));
 
-  // Verify that extensions page shows that the lazy background page is
-  // inactive.
-  content::RenderFrameHost* frame = content::FrameMatchingPredicate(
-      browser()->tab_strip_model()->GetActiveWebContents(),
-      base::Bind(&content::FrameHasSourceUrl,
-                 GURL(chrome::kChromeUIExtensionsFrameURL)));
-
   // Updating the extensions page is a process that has back-and-forth
   // communication (i.e., backend tells extensions page something changed,
   // extensions page requests updated data, backend responds with updated data,
@@ -616,7 +610,7 @@ IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, UpdateExtensionsPage) {
   int num_tries = 0;
   while (!is_inactive && num_tries++ < kMaxTries) {
     EXPECT_TRUE(content::ExecuteScriptAndExtractBool(
-        frame,
+        extensions_page,
         "var ele = document.querySelectorAll('div.active-views');"
         "window.domAutomationController.send("
         "    ele[0].innerHTML.search('(Inactive)') > 0);",